JPS612878A - Gas mask equipped with pump apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to keep the wearer's head occupied and keep the mouth and nose airtight.
This invention relates to an air-excessive gas mask having five sides.

[Prior art and problems]

Gas masks of the above type usually have an air intake part and an air discharge part, and this air discharge part has a check valve, and this check valve releases exhaled air exhaled by the wearer into the face part to an external pressure. open for The air suction part of the surface part is connected to the air discharge part of an air filtration device attached to the surface part. The air filtration device filters the air drawn into the mask from outside when the wearer inhales, that is, the P material of the filtration device removes dust, vapor, and gas from the inhaled air. It is a structure.

Under some circumstances, rather than drawing air into the gas mask through the breath of the gas mask wearer, the gas mask may be equipped with a pump that forces air into the mask, creating a It may be preferable to provide the wearer with comfortable breathing through the material. To this end, British Patent No. 20.32.21rQ proposes to provide the above-mentioned pump in the face of the gas mask, but this requires a special shape of the face of the gas mask. The drawback is that it cannot be applied to the face of commercially available gas masks.

[Purpose and outline of the invention]

According to the present invention, it is possible to eliminate the above-mentioned drawbacks and provide a modular pump device that can be detachably attached to and held on the face of a gas mask. The pump device has a housing, the air inflow part and the air outflow part are connected to the air inlet of the surface part, and the housing houses a motor and a blower, and the blower has an air inflow part and an air outflow part. is connected to be driven by the motor, an air outlet of the blower is connected to an air inlet of the housing, and an air inlet of the blower is connected to an air outlet of the housing.

According to another aspect of the invention, a forced inhalation gas mask can be provided. The gas mask has a face part that is held on the wearer's head and covers the wearer's nose and mouth, and has an air inlet, an air outlet, and a check valve device. The valve device is located in the air outflow section to let the air out of the surface section, and the air inflow section of the surface section has a can-shaped air filter for filtering the air and supplying the air to the air inflow section. The air filtration device has a housing, the housing has an air inlet and an air outlet, and includes a swell material, and the gas mask has a modular pump device, the pump The device is for supplying air to the above-mentioned surface section and has a housing.The housing has an air inlet and an air outlet, and also contains a motor and a blower connected to and driven by the motor. The air inflow part is connected to the air inflow part of the housing, and the air outflow part from the blower is detachably attached to the surface part through the air outflow part of the housing, the air filter device, and the bong device. The air inlet of the one housing is directly connected to the air outlet of the other housing, and the air outlet of the one housing is engaged with and coupled to the air inlet of the surface.

The modular pump device can also be mounted directly to the face by engaging the air outlet of the housing with the air inlet of the face, in which case the air filtration device is attached to the air outlet of the housing. is connected to the air inlet of the pump device. Moreover, the air outflow part of the said pump device can be connected to the air inflow part of the said air filtration device, and the air outflow part of this air filtration device can also be connected to the air inflow part of the said surface part.

The blower of the modular pump device may be of an axial flow type or a centrifugal type, and is directly connected to the shaft of a DC motor that uses radio waves as a power source. The battery has an on/off switch, is housed in a separate container, such as a container in the wearer's clothing pocket, and is wired to the pump device.

In order to minimize the length of the modular pump device and air filtration device protruding from the surface, and because the air inlet and air outlet of the air filtration device are coaxial, the pump device The air inlet and air outlet of the housing may not be coaxial (orthogonal or parallel).

The former, that is, the right angle structure, has the advantage that the pump device can be installed between the air filtration device and the surface part,
The latter, parallel spaced structure, has the advantage that the pump device can be coupled to the air inlet of the air filtration device, and a portion of the housing of the pump device can be horizontally coaxial with a portion of the housing of the air filtration device. There is.

In particular, when the pumping device is coupled to the air inlet of the air filter, no seals are required to prevent accidental entry of outside air, so the pumping device can be manufactured at low cost. can. Therefore, when the pump device becomes contaminated with atmospheric dust, gas, or steam, it can be thrown away without cleaning, which is a very great advantage.

When the modular pump device is attached to the air inflow portion of the air filtration device, it is possible to install the pump device into the air outflow portion K of the housing of the pump device and the air inflow portion of the air filtration device. Once the device is attached, the wearer can easily use it as a gas mask without the traditional forced inhalation when he or she wants to breathe.

The surface part, the modular pump device, and the air r
The assembly of the device is described in published European patent application no.
As described in No. 91I737, the pump device may be configured to stop or almost stop during all or part of the cycle when the wearer exhales (according to the cycle).
Thereby, the life of the air filter can be extended.

Furthermore, if a pressure sensor is provided at the air inlet of said blower to control the supply of electricity to the motor of said blower, as described in published British Patent Application No. 27'l/34# The battery life of the air permeator and motor can be extended.

Additionally, a pressure sensor may be provided inside the surface portion and attached to or attached to the circuit of the blower motor, as described in British Patent No. 203:12ge (as described in British Patent No. 203:12ge). It is also possible to control the power supply to the motor in accordance with the breathing cycle.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

A forced inhalation gas mask is shown in FIGS. 7 to 3.

This gas mask has a conventional face part /, which face part l has a masking part for covering the wearer's face, and a band 3a for supporting the masking part on the wearer's head. The mask part λ has a peripheral edge that is airtightly held against the wearer's face and has a device for viewing the outside, such as glasses 3b. There is a nose piece inside the mask part, which covers only the wearer's nose and mouth, and is held on the wearer's face by the mask part.

The mask part 21C has an air intake part, that is, an air inflow part S, and the nose pad has an air discharge part, that is, an air outflow part 6,
Seven or more openings 7 provided in the nose piece communicate with the inside of the mask part and the inside of the nose piece.

A check valve type device g is provided at the air intake, and this check valve g is opened by a deflection device, for example a compression spring, when a predetermined positive pressure value is reached inside the cover. Further, each of the air outlet portions 7 is also provided with a check valve. allows air to pass from the mask to the nosepiece, but prevents the wearer's exhaled breath from flowing into the mask. The air inflow section 5 is also provided with a reverse valve 10, which allows air to pass through the masked section but not the other way around.

As shown in the figure, the air inflow section 5 opens laterally at the left side of the mask, that is, at the left side for the wearer.

The mask part has the air inflow parts on both left and right sides, and the wearer can operate only the left air inflow part with his left hand, and only the right air inflow part with his right hand. Further, the air inflow portion may be made to protrude forward from the center of the masking portion and may be rotatably mounted (see FIGS. 9 and 11). As shown in the figure, the air intake part has a radially extending flange //, and a check valve 10 and a sealing washer /2 are attached to this flange l/, and this sealing washer/co has a flange // extending in the radial direction. are screwed together.

As shown in the figure, a modular pump device 14 is directly mounted and supported on the surface. The pump device lq has a cylindrical, e.g. plastic, tube 15, the air inlet opening 16 and the air outlet opening 17 of the housing 15 being coaxial. The air outlet slt has a threaded shroud/g which is screwed onto the shroud 13 of the face air inlet. The ends of the shroud/g are supported by washers/2 when the housing 17 is fully engaged with the face. The air inlet 16 of the housing is identical to the air inlet S of the face of the shroud 2/, which has seven radially extending flange/9, a sealing washer and a thread.

There is an axial blower inside the housing 15, and this axial blower 22 is directly connected to the shaft 23 of the DC motor 2q. The DC motor is mounted in a casing J, which is attached to the inner casing core by means of an airfoil member, and which is attached to the inner casing 2.
7 is the housing 1 by the resilient plotter 2g.
Supported within 5. The above blower Q2 has a housing 15
The air inflow part of this blower is connected to the air inflow part 16, and the air outflow part of this blower is connected to the air inflow part 17.

The DC motor is powered by seven or more batteries (not shown), and the batteries are powered by a separate compartment that can be carried, for example, in a wearer's clothing pocket. is housed in
It is connected to the DC motor 2'l by a cable 30. The internal wiring of the container 29 is equipped with a switch 3 for opening and closing the circuit, and this switch 3 controls the supply of power to the DC motor.

An air filtration device 32 is coupled to the air inlet 16 of the pump device. The air filtration device can be of any shape to facilitate filtering particulates, gases, and/or vapors. As shown in the figure, the conventional air filtration device has a cylindrical housing 33, and a shroud 35 is provided at the air outlet portion 3da of the housing 33, and the shroud 35 is screwed into the shroud.

The housing 33 has an air inflow section 36 . The air filtration device separates dust, gas, and/or steam from the air it inhales, and has an F material portion, a filter 37, and carbon grains 3gf. The 775 wings', 37 cross the air inlet 36, and the carbon grains are on the downstream side of f#J'y.

The air inflow part and air outflow part of the pump device 16 are made to have the same shape as the conventional surface part and the air inflow part and air outflow part of the air filtration device, so that the pump device 16 can be optionally attached to a conventional non-forced inhalation type gas mask. As needed, and as needed.
Preferably, there is an attachment between the trap face and the air permeation device that facilitates breathing for the wearer.

In some cases, it may be better not to mount the pump device between the surface and the air filtration device, but simply to the air inlet of the air F1 filtration device. An embodiment of the pump device in this case is shown in FIG. In this case, the surface portion (only the air inflow portion is shown) is the same as that explained with reference to FIGS. 1 and 3, and the air passing device is also the same, so similar parts are designated by the same reference numerals. . The above pump device It! , 17 are the housing 1 as in the above embodiment.
5, and an axial blower and a motor are located inside the housing 15. Housing this blower and motor! The procedure for attaching it inside is the same as in the above embodiment. However, in this case, the air inlet 16 of the housing 17 is a simple opening, and the air inlet 17 has a large shroud width 0, which shroud width Q allows the air in the cylindrical housing of the air filtration device. It is large enough to accommodate the inflow section. The above shroud lI.

has a size that can be matched with the air inlet end of the nousing of the air filtration device, and its attachment/detachment device, for example, a flexible sleeve l/ having elasticity, is attached to the shroud width θ to allow air to pass through the shroud. Attach to the filter housing. From the perspective of protecting the safety of the wearer,
The seal between the pump device and the air permeation device is of minor importance. This is because the air that the wearer breathes is always purified by the air permeation device even if the seal is imperfect. However, from the viewpoint of the efficiency of the pump device, it is preferable to set the pressure appropriately.

The method of attaching the above pump device to the air filtration device is to attach the air filtration device to the surface during use.
The pump device must be designed so that it can be simply and easily attached to the air inlet of the air filtration device.

Air filter devices and pump devices need to have short horizontal extensions from the surface so that the moment due to their own weight when attached to the surface is minimized. It is preferable to use a centrifugal type instead of a type. FIG. 5 shows a pump device in which the blower is a centrifugal type. This pump device is of the type that is mounted between the face and the air filtration device. In this case, the housing of the pump device has an air inlet/'+ and an air outlet 16, and the axis of the air inlet and the axis of the air outlet are perpendicular to each other. The shape of this air inflow portion 16 is exactly the same as that shown in FIGS. 1 to 3. This is so that the air outlet of a conventional air filtration device can be fitted.

The air outflow section 17 has a shroud/g, which is inserted into the shroud of the air inflow section S of the face part and supported by a sealing washer/y. However, in this case, since the orientation of the pump device/41 with respect to the surface is important in order to orient the air inflow portion 16 and the air filter device in the correct direction, the shroud 1g itself is not provided with a threaded portion, and the shroud 13 is The shroud/g is supported using a NAND qs screwed onto the shroud/g. In this case, the inner wall of the motor housing 15 is simply attached to the housing 15, and the shaft 3 is extended from the motor 4f to the centrifugal blower 2211C to transmit the driving force of the motor 1 to the blower 2211C. The air inflow part 22a of the blower is directly connected to the air inflow part 16 of the housing, the air inflow part of this blower is aligned with the air outflow part 17, and the part of the housing surrounding the blower is connected to the spiral casing of the blower and the blower. Shape to form an appropriate air outflow part.

In this example, the axes of the air inflow section 16 and air outflow section 17 of the pump device/41 are set so as to be on a generally horizontal plane (as shown in the figure) or on a vertical plane.

FIGS. 6 to 3 show pump devices of other structures using centrifugal blowers. This pump device is attached to the air inlet of the air filtration device. In this case, the air inlet 16 and air outlet 17 of the housing 15 of this pump device are spaced parallel to each other. This is a motor review air filtration device 32
This is to arrange them in the following structure.

The blower 2a and the motor assembly are installed in the housing 15 as in FIG. This housing extends horizontally to an air outlet 17, and this air outlet 17 is provided with a shroud yo as in the case of FIG. Engage with the inlet side end so as to cover it.

The shroud 40 is engaged with the air filtration system in exactly the same manner as the shroud 40 of FIG.

In this embodiment, it is better to mount the pump device on the underside of the air filtration device 32.

Figures 9 and ioK show further embodiments of the pump device. This pump device is somewhat similar to the pump device shown in FIG. 5, and the shape of the surface portion is slightly different from that shown in FIG. This surface/
As in each of the above-mentioned embodiments, the mask has a mask portion that covers the wearer's face and a band 3a, and is fixed to the wearer's head by the band 3a. The above-mentioned masked part has a visual recognition device, but in this embodiment, this visual recognition device is the visor 3C.
It is. There is a nose pad inside the mask, which covers only the wearer's mouth and nose, and is held on the wearer's face by the mask.

The surface portion has a forward-facing air inflow portion S in the center thereof, and this air inflow portion S opens into a space between the mask portion and the nosepiece. Further, a check valve (not shown) may be provided in the air inlet. The nose piece has an air outlet 6, which communicates with the inside of the nose piece and opens toward the front below the air inlet S, and has a check valve type exhaust valve. (not shown), which can be deflected to expel air from the mask. As in each of the above embodiments, the inside of the nose piece and the inside of the face part are
It communicates by more than one opening 7, each of which is provided with a check valve.

The pump device/lit is directly connected to the air inlet 5 of the surface and supported by this surface. Further, the bomb device/4' has a housing 15, and this housing 15
The housing has an air inflow section 16 and an air outflow section 17, and a shroud for screwing into the air inflow section S of the surface section is screwed into this housing. Inside the housing 15, there is a centrifugal blower and a motor 2 that drives this blower.
There is a

The housing 15 is made of a suitable material, e.g. by plastic molding, and is made of three parts and has a generally flat inner wall or support member 6, one side of which supports the motor plate. , the other side supports the blower, 22. The shaft 23 of the motor passes through the wall 'IA' and directly engages the blower.

The wall portion 4'6 has a flange ia on its periphery, and a generally cup-shaped housing portion /3b is attached to this flange 4iAa, and this housing portion /3b surrounds said motor plate and engages said seven flange. . A further part /jc of the housing also engages the flange and together with the axial inlet 16 of the housing, the air outlet of the blower and the air outlet of the housing 17 form the spiral casing of the blower n. .

Next, the air filter device 32 is connected to the air inflow portion 161C of the pump device, as in the case of FIG.

A great advantage of the structure of this pump device and the associated surface and air filtration device parts is that the weight of the motor and air filter device around the axis of the pump device air outlet and the air inlet of the surface. The moments are almost balanced.

As mentioned above, the pump device of all the above embodiments has the switch 3
operates continuously as long as / closes the circuit. However, a pressure sensor as disclosed in GB 20322g'1 can also be provided in order to control the power supply to the motor and thus the operation of the blower. Based on this British Patent No. 20.322g'1, a pressure sensor SO can be provided in the surface, as shown in broken lines in FIG. Since this pressure detector 5Q must be connected to the circuit of the motor J, a connector S/ is provided on the surface, and this connector S/ is used to connect the pressure detector to the battery, switch, and motor circuit, respectively. .

The parameters for operating the pump device are as described in European Patent Publication no. It can also be set so that the
According to No. 1g, as shown by broken lines in Figures 3 and S,
A detector may be provided to detect the pressure at the air inlet of the blower and the pressure difference between the air inlet of the blower and the air permeation device. The detector may be provided at the air inflow part of the blower (or, as shown in FIG. 5, may be provided at another location, for example, in a part of the housing of the pump device, and the motor is used to exhaust the air). It may also be connected to the air inflow section of the blower via.

〔effect〕

A common advantage of all the embodiments described above is that by making most of the components of the pump device from plastic materials,
The pump device can be made extremely inexpensive and lightweight.

The pump device can therefore be made disposable. That is, when the pump device becomes contaminated or crystallized, it is removed and thrown away rather than being cleaned or repaired for reuse.

It is also an advantage of the pump device described above that it can be used with other types of surfaces, such as the surface shown in FIG. 11, which is shaped to fit over the wearer's mouth and nose. The air outflow part 6 has an air outflow part in the wearer's nose area, and the air inflow part 5 has an air outflow part in the central part below the air outflow part. It has a shroud /3 screwed onto the shroud /3, to which an air filtration device or pumping device is connected, which air filtration device or pumping device is supported by the shroud on the surface.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a gas mask according to the present invention having a face, an air filter device and a pump device according to the present invention, FIG. Ω is a longitudinal sectional view of the gas mask of FIG. Figures 1 and S are cross-sections of other types of gas masks according to the present invention. 7 and S are cross-sectional views of the air filtration device and pump device of FIG. 6; FIG. 9 is a cross-sectional view of the air filtration device and pump device of FIG. a perspective view of a gas mask of the present invention including other types of pump parts according to the invention;
FIG. 10 is a sectional view taken along line X--X of the gas mask of FIG. 9, and FIG. 11 is a perspective view of another type of mask. /... Surface part, S, 16, 34... Air inflow part,
t, 17° 3 da... air outflow section, S... check valve device, l da... pump device, /! ;, 33...Housing, 22...Blower, 2'l...Motor, 3.
2...Air filtration device, 3'7.3g...P material, po
...Nyuroud, 41... Attachment/detaching device. The applicant's representative, Kiyoshi Inomata, also submitted 5 figures and 10 flashes.

Claims (21)

[Claims] (1) It is detachably held on the face of a gas mask and has a housing (15), this housing (15) has an air inflow part (16) and an air outflow part (17), and this air outflow part (17) is connected and attached to the air inflow part of the surface part, and the housing incorporates a motor (24) and a blower (22) driven by this motor, and this blower (2
The air intake part (2) is connected to the air inlet part (16) of the housing.
), wherein the air outlet of the blower is connected to the air outlet of the housing. (2) Air outflow part (17) of the housing of the pump device
) is attached to and detached from the air inlet part of the surface part, the air inlet part (16) of the housing of the pump device is attached to and detached from the air outlet part of the can-shaped air filtration device, and the air outlet part (17) of the housing of the pump device is attached to and detached from the air outlet part (16) of the housing of the pump device. ) and an air inflow part (16) have shapes that correspond to each other, and a pump device is installed between the air inflow part of the surface part and the air outflow part of the can-shaped air filtration device, and this pump device 2. The modular pump device for a gas mask according to claim 1, wherein attachment methods other than those described above are also possible. (3) Air outflow part (17) of the housing of the pump device
), but by attaching and detaching the air filtration device to the air inflow part,
2. The modular pump device for a gas mask according to claim 1, wherein the pump device is detachable from the housing of the air filtration device, and the housing engages with the air inflow portion of the surface portion. (4) the air filtration device has a generally cylindrical housing and an air inlet and an air outlet coaxial with the housing;
The air outflow part is engaged with and attached to the air inflow part of the surface part, and the modular pump device is attached to the air passing device so as to work together, and the air outflow portion (17) of the housing of the pump device is attached. has a shroud (40);
An air filtration device housing is inserted into the shroud (40), the air filtration device housing is adjacent to the air inlet of the air filtration device, and the modular pump device is connected to the air filtration device housing. A modular pump device for a gas mask according to claim 1, characterized in that it has an attachment/detachment device. (5) Claims 1 to 4, characterized in that the blower (22) is of an axial flow type, and the air inlet (16) and the air outlet (17) of the housing are coaxial. A modular pump device for a gas mask according to any of the preceding paragraphs. (6) A gas mask according to claim 5, characterized in that the housing (15) is generally cylindrical, and the air inlet (16) and air outlet (17) are coaxial. Modular pump equipment for. (7) the blower (22) is of a centrifugal type, and the housing (15) has a spiral casing of the blower;
The blower (22) has a motor (
24), the motor (24) is provided on one side of the blower, and the air inflow portion of the blower is provided on the opposite side of the blower. 5. A modular pump device for a gas mask according to claim 4. (8) the motor (24) and the air inlet (16) of the housing are on either side of the axis of the air outlet (17) of the housing, and the weight of the motor is in use on the air inlet of the housing; 8. Modular pump device for a gas mask according to claim 7, characterized in that it balances at least to some extent the weight of the device connected to (16). (9) The blower is a centrifugal type, and the air inflow portion (16) of the housing is approximately coaxial with the air inflow portion of the blower, and the air outflow portion (17) of the housing is the air outflow portion of the blower. an air inlet (16) of said housing extending perpendicularly to said air outlet from said housing;
The motor (24) is spaced apart parallel to the axis of the housing, and the motor (24) is disposed below the air outlet (17) of the housing and protrudes from the surface of the air outlet (17) of the housing so that the motor (24) is spaced parallel to the axis of the housing when in use. 5. Modular pumping device for a gas mask according to any one of claims 1 to 4, characterized in that it extends below the device connected to the air outlet (17) of the gas mask. (10) Attached to the wearer's head to cover the wearer's nose and mouth, and an air inflow part (5) and an air outflow part (6)
, a surface portion (1) having a check valve device (8) for discharging air within the surface portion built in the air outflow passage; a can-type air filtration device (32) for filtering air flowing into the inflow portion; part (36) and an air outflow part (34), and a filter medium (
37, 38), a modular pump device (14) for feeding air outside the mask to the surface section, an air inflow section (16), and an air outflow section (17). It also has a housing (15) containing a motor (24) and a blower (22) connected and driven by the motor, and the blower (22) has a blower connected to the air inlet part (16) of the housing. An air outlet of a blower is provided that communicates with the air inlet and the air outlet (17) of the housing, and the air filtration device (32)
) and a modularized pump device (14) are removably attached to the surface, and the air filtration device (32
) of the housing (33) or the air inlet (16) of the housing (15) of the pump device (14) is directly connected to the other; A gas mask characterized in that an air outflow section (17 or 34) is engaged with and attached to an air inflow section (5) of the surface section to forcibly introduce and purify air. (11) The gas mask according to claim 10, characterized in that the air outlet (17) of the modular pump device is coupled to the air inlet (5) of the surface part. (12) In order to install the modularized pump device (14) between the air inflow portion (5) of the surface portion and the air outflow portion (34) of the air filtration device (32), The outflow part (17) and the air inflow part (16) can be shaped to correspond to each other, and the air inflow part (5) of the surface part and the air outflow part (34) of the air filtration device (32) can be directly connected. Characteristic claim 1
Gas mask according to item 1. (13) The housing (3.2) of the air filtration device (3.2)
The air outflow part (34) of 3) is connected to the air inflow part (5) of the surface part.
) Claim 10 is characterized in that it is directly connected to
Gas mask as described in section. (14) The air inflow part (17) of the housing (15) of the modular pump device (14) is connected to the air inflow part (3) of the housing (33) of the air filtration device (32).
Claim 1 characterized in that it can be attached and detached to 6).
Gas mask according to item 3. (15) Housing (33) of the air filtration device (32)
) is generally cylindrical in shape, its air inlet (36) being coaxial with said cylindrical part, and said housing (
A shroud (40) is provided at the air outlet (17) of the air filtration device (15), and this shroud (40) serves as the air inlet of the housing (33) of the air filtration device and the air outlet (17) of the housing of the pump device. 15. A gas mask according to claim 14, characterized in that the gas mask is fitted with a detachable device (41) between the housing (33) and the housing (33) of the air filtration device. (16) The blower (22) is of an axial flow type, and the air inlet (16) and air outlet (17) of the housing (15) of the modular pump device are coaxial. A gas mask according to any one of claims 10 to 15. (17) The housing (15) of the modular pump device has a generally cylindrical shape, and its air inflow portion (16)
) and the air outlet (17) are coaxial with respect to the housing (15).
Gas mask according to item 6. (18) The blower device (22) is of a centrifugal type, and the air inflow portion (16) and air outflow portion (17) of the housing of the modular pump device are the same as the air inflow portion and air outflow portion of the blower. The gas according to any one of claims 10 to 15, wherein the blower drive motor (24) is coaxial, and the blower driving motor (24) is disposed on the opposite side of the air inflow part of the blower. mask. (19) The air outflow part (17) of the modular pump device is directly connected to the air inflow part (5) of the surface part,
The air filtration device (32) is coupled to the air inlet (16) of the housing of the pump device, and the weight of the motor rotates the air filtration device (32) about the axis of the air outlet (17) of the pump device. 19. Gas mask according to claim 18, characterized in that it balances at least to some extent the weight of 32). (20) The blower (22) is a centrifugal type, and the air inlet part (1) of the housing of the modular pump device is
6) is coaxial with the air inflow part of the blower, and the air outflow part (17) of the pump device extends from the air outflow part of the blower at right angles to this air outflow part to connect the air inflow part (16) of the blower. ), the motor (24) is arranged on one side of the blower (22), and the air outlet of the blower is provided on the opposite side of the blower (22). Air outflow part (17) of the pump device
).
The gas mask according to any one of items 0 to 15. (21) the air outlet (17) of the housing of the modular pump device is coupled to the air inlet (36) of the housing (33) of the air filtration device; Air filtration device (32)
Claim 20, characterized in that it extends below the
Gas mask as described in section.